Herbicides effect on weeds and yield of late sown wheat

摘要

Weeds are one of the prominent constraints in achieving potential yield of wheat. Wheat crop suffers with mix flora of weeds. The losses caused by weeds vary depending on the weed species, their abundance, crop management practices and environmental factors. It has been reported that with production of each kilogram of weed, one kilogram wheat grains are reduced (Chaudhary et al. 2008J. Herbicides are one of the major groups of pesticides which contribute to the increased and economical production ofcrops and minimize human toil in agriculture production. In this context, the continuous use of a particular herbicide for many years resulted in development of resistance against some weeds which happened in case of isoproturon (Malik and Singh 1995).It become necessary to access the application time, method and doses at micro farming levels which may varied according to soil type, micro climate, weed flora and its severity from their recommendations. Hence, an attempt was made to find out efficacy of alternate herbicides at different doses on wheat growth, yield and its associated weeds.